Sound amplifier



Oct. .6

J. C. KLACZYNSKI SOUND AMPLIFIER Filed' June 6I 1922 m m M Patented Oct. 6, 1925.

isaiasi JOHN C. KLACZYNSK'T.

OF CHICAGO, ILLINIS.

SOUND AMPLIFIER.

Application filed .Tui-.1.o 6,

To all fir/iam, t rnfiy/ conce/ra Re it known that l, Jeux C. Knw ,l a citizen ot the United States. r s nj at Chicago, in the countv ot Cool; and State ot lllinois. have inve d certain new and use ful Improvements in Sound tuorli-ieri ot which the following is a specification. reiterence beingl had therein to the accoinpanvinn; drawing'.

Mv invention relates to new and useful improvements in sound amplifiers tor phonographs or other musical instruments ant has for its principal object the Constr-tuition ot the amplifier in such a manner as to give off a clear. distinct. and tull tone.

A further object resides in the provision ot' means tor regulating the sound to anv desired pitch, said regulating beine` accaniplished b v having a pluralityv ot' sound outlet openings adapted to be opened or closed` at will bv dampers or valves.

lith the above and other objects in view, which will appear as the description proceeds. mv invention consists in the novel details ot construction and arrangement ot' parts described in the tollowinr speeiiication and illustrated in the ace(anpanyino drawings, and while I have illustr: `l ard describedl the preferred einlua'linieuts ot' the invention as thev now appear to me it will be understood that srch changes ina l e made as will tall within the scope ot the appended claims.

Tn the drawings:

Fig. l is a top plan.

2 is a longitudinal vertical section and Fig'. 3 is a transverse vertical section.

The amplifier comprises the ton l. the sides 2 which are straight. the ends which are inclined as shown, and the tlat bottenk 4,. The top 1 is provided, over the flat bottonn with a sound inlet openinel 5 over which is adapted to be secured the reproducer (i ot a phonoorrapb, or other musical instrument, ot well known construetion. To each side ot the sound inlet opening 5 I provide a sound outlet opening 7 these sound outlet openings being positioned over the inclined ends 3. A perforated plate 8, preterablv ot screeninrr`r is secured in each ot the outlet openings 7, to prevent objects from dropping' into the bov. The top 1 mav be ot a solid strip or ot pluralitv ot strips as shown in the drawinos. and when formed of a plurality ot strips the 1922. Serial No. 5667258.

perforated plates or screening may be secured therebetween.

dependinr; lanoje 9 is secured to the underside ot the top l, around the inletopeni said tiaugje is ot such a size as to engr ,ee tie sides 2 but to allow tor a passano between the ends 3. rilhe inner face e il is uitwai-dl;v tapered as l0 so that the bottom interior i ther-cot will l greater than the top rterior flizuu. eV outer tace is downwurdl,v ier s shown at ll so that the space between this 'flange and tbe inclined ends will be .Greater attbe top than at the ltfottoi'u, The 'ianfre 9 terminates above the bottom 1t tor purpose which will later appear. The sides 2 and ends 3 are preterablv formed a separate unit trom the top l and will oo secured to said top b v ine-ans oit the screws or other suitable testenine; ineans. il. strip ot telt lf3 will be inserted between the top ot the sides and ends and the bottom oit the top l. This will prevent vibration due to the sound waves.

Secured to the top l. adjacent each ot the outlet openings is a `euidt-z-wav lli which preterablv ir the torni ot anale iron to 'receive the slides l5 having' the knobs if l which thev ma)Y be actuated. The. slides vlo niav te operated to entirely cover the outlet openings fr to entirelv uucover said openings or to partiallv cover the openings.

From the above it will be seen that I have provided a sound amplifier which inav be positioned in a phonofrraph or other1 inusical instrument in such a manner that 'the sounds mav be emitted in an upwardlv direction and that bv iuovidine` the slides over the outlet openings I inav regulate the pitch and throw oil a clear, distinct and full tone. rhe sound will enter the inlet openino; 6 from the repro'ducer arni aud will be directed bv the depending' tlannje 9 towards the bottoni 4. From the bottom 4.-v the sound will be diected or echoed to the ends and then emitted through the outlet openino's 7. rilhe pitch may be reo'ulated` as previouslv stated. bv operating the slides lo and the outlet openinogs 7 ma]Y be entirelv uncovered. or partiallv uncov- 'ered as desired( The perforated plates or sereeninfr 8 will prevent articles troni bein@ dropped into the sound amplifier to iu anv wa;7 impair the tone. The amplifier mav fil be made complete as a unit for attachment to the phonograph or if desired the top 1 may be the usual top of a phonograph or similar instruments now commonly in use. The density of sound may also be regulated by uncovering merely one of the outlet openings 7 or uncovering both of them. The sides, ends, and bottom of the amplifier will be constructed of such material as to give off clear tones. I have found,` in practice, by using an amplifier such as l have constructed that the tones are not directlyv emitted but instead are echoed from the bottom to the ends and then outwardly so as to give off a clear, distinct and Jfull clear tone.

Having fully described my invention what I claim as new and desire to secure by Letters Patent isf:

1. A sound amplifier for musical instruments including a top supporting plate having a sound inlet opening and a sound outlet opening on each side thereof, a depending housing secured to the top plate, said housing having a fiat bottom, straight sides and inclined ends, and a de ending member surrounding the sound in et opening and extending into the housing, said depending member being spaced from the fiat bottom of the housing and the ends thereof but engaging the sides.

2. A. sound amplifier for musical instruments including a top supporting plate having a sound inlet opening and a sound outlet opening on each side thereof, a depending housing secured to the top plate, said housing having a flat bottom, straight sides and inclined ends, the sound inlet opening being positioned over the flat bottom and the sound outlet openings being positioned one over each of the inclined ends, and a depending member surrounding the soundinlet opening and extending into the hausing. said depending member being spaced from the fiat bottom of the housing and theY ends thereof but eng-l Ging the sides.

In testimony whereof I hereunto aix, my signature.

JOHN C. KLACZYNSKI'. 

